I got a such trouble with Gnome Power Manager: there are no suspend or hibernate modes in settings menu and in shutdown dialog. In gnome power statistics there are no devices, and brightness applet is not working. But when i use pm-suspend, my laptop successfully suspends and wakes up, when i switch off laptop from socket it changes screen brightness. In lshal can_suspend=true, in gconf too.
Are there any ways to solve this problem?
Thanks!

Neither as root nor as normal user (with groups wheel, plugdev and a lot more) gnome-power-manager (2.28.1) shows suspend or hibernate button. It also lacks providing the battery tab in the settings. Seems that gnome-power-manager is not aware of the system capabilities and configuration.

In general suspend and hibernate as normal user works w/o problems, e.g. these both lead to suspending:

I suspect you've got one of the possible SNAFUs
of mixing stable and unstable.
Interface of DeviceKit-power was in a flux till
Gnome 2.28 release (still is much more unstable to feel really safe).

You're probably be facing shortly fun of udev/e2fsprogs-libs/util-linux/hal
(plus a few things I probably missed, as I only mention things I needed to upgrade
- no, I don't use Gnome, for me that upgrade was caused by another reason) upgrade
to make it possible for a recent DeviceKit-power to be emerged and function correctly.

if I would remove my packages.keywords (a lot of packages in there) und packages.unmask (just a few) I wouldn't be able to install/update anything. I only added the packages+versions that where necessary to make a "emerge -uDN system world" work resp. to make stuff at least compiling.

Nothing more in there than things needed to be able to compile system+world. Seems that the portage is a bit messed up.

But I think you are right with your assumption.

I am afraid, that at the end I have to go back to M$ world - maybe M$ Windows 7 works better with my Thinkpad. Please not...